Reference Guide

Item
Non-
Volatile or
Volatile
Quantity
Reference
Designator
Size of
memory
Type of
memory
(e.g. Flash
PROM,
EEPROM)
Can user programs
or operating
system write data
to it during normal
operation?
What is the
Purpose?
(e.g. boot
code)
How is data
written to
this
memory?
How is
memory write-
protected?
How is memory
cleared?
System CPLD
RAM
Volatile
1
U_CPLD1
92 Kb
RAM
No
Not utilized
Not utilized
Not accessible
Not accessible
System CPLD
FLASH
Non-
Volatile
1
U_CPLD1
256 Kb
Flash
No
Power on
System
Firmware
Firmware
update
BIOS Security
Protocols
User cannot clear the
memory.
System
Memory:
UDIMM
Volatile
Up to 4
DIMMA1,
DIMMA2,
DIMMB1,
DIMMB2
Up to 16
GB per
DIMM
DRAM
Yes
System OS
RAM
System OS
OS Control
Reboot or power down
the system.
Internal
USB
Key
Non-
Volatile
Up to 1
INT_USB1
Varies
(not
factory
installed
)
Flash
Yes
General
purpose USB
key drive
USB interface
via PCH.
Accessed via
system OS
Not write-
protected
Can be cleared in
system OS
CPU
Volatile
1
CPU1
Various
Cache +
registers
Yes
Processor
cache +
registers
Various
Various
Remove A/C
iDRAC
DDR
Volatile
1
U_IDRAC9_
DRAM1
512 Mb
DRAM
No
iDRAC
local
memory
iDRAC
Firmware
Not write- protect
Remove A/C